对液体空化机理的进一步探讨

Further Exploration of Liquid Cavitation Mechanism

针对当前液体空化机理的各种假设所存在的缺陷，应用热力学原理，对气泡核子作了进一步探讨，并得出在平面平衡的条件下，液体内部不可能稳定地存在纯蒸汽泡；在亲水性裂隙中气核是不可能稳定存在的；而在憎水性裂隙中气核是可以稳定存在的．还讨论了影响空化产生及发展的一些因素，在考虑固体表面糙度、水中杂质、含气量等因素后，用一个修正的空化数σ′１ 来作为衡量空化能否发生的依据，更为确切．这些论述，对气核假说的理论作了充实和完善．

Aiming at the limitation in the various hypothesis of liquid cavitation mechanism and applying the principle of thermodynamics,this paper explores the characteristics of bleb nucleon.It is impossible that there should exist vapor nuclei stably in the liquid under the condition of plain balance.A bleb nucleon can exist stably in the hydrophobic cranny but not in the hydrophilic cranny.The paper also discusses some factors affecting the generation and development of cavitation.It is more definite to judge whether cavitation can occur by using a modified firstborn cavitation parameter σ ′ 1 .All the discussion enriches the bleb nucleon theory.